2-Propenoic acid, 2-hydroxyethyl ester, reaction products with O,O-bis(dialkyalkyl) hydrogen phosphorodithioate and dimethyl phosphonate

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27 June 2019 to 10 September 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7220 (Boiling Point / Boiling Range)

Version / remarks:

1996

Deviations:

no

GLP compliance:

yes

Type of method:

other: modified Siwoloboff procedure

Boiling pt.:

>= 174.9 - <= 178.7 °C

Atm. press.:

101.325 kPa

Decomposition:

yes

Decomp. temp.:

180 °C

Key result

Boiling pt.:

178.7 °C

Atm. press.:

101.325 kPa

Decomposition:

yes

Decomp. temp.:

180 °C

RESULTS AND DISCUSSION

- For the boiling point/range determinations, instrument performance was verified through the use of reference melting point standards. All reference substances provided acceptable results.

- The testing for the boiling point was performed using a gradient of 1 °C per minute. The instrument was verified using an ethanol boiling point reference standard and three melting point reference substances; caffeine, benzophenone and anthroquinone (see Table 1, attached).

- The test substance samples displayed an initial emergence of bubbles at a mean corrected or normalized temperature of 174.9 ± 1.5 °C (448.1 K) for the three tests.

- The initial bubble emergence was visually observed to be at a slow rate and increased as a function of increasing temperature until the actual boiling point was reached.

- The mean boiling point was 178.7±0.5 °C (451.9 K). The boiling range was that temperature range from the initial observation of bubbles through the boiling point (i.e. 174.9±1.5 °C (448.1 K) through 178.7±0.5 °C (451.9 K).

- Prior to the start of each test, the test material (inside the boiling tube) was observed to be a light yellow liquid. At the boiling point, the samples were light yellow; no change in colour. However, one sample was heated further to see if thermal decomposition would occur at a higher temperature; at 180 °C a reddish-purple colour was observed–possibly indicating thermal decay.

- Results of the normal boiling point data, corrected to standard barometric pressure, for the test substance are presented in Table 2 (attached).

Conclusions:

The definitive boiling point testing showed an initial emergence of bubbles at a corrected or normalised temperature of 174.9 ± 1.5 °C (448.1 K). The boiling point was 178.7±0.5 °C (451.9 K). Thermal decomposition seemed to occur at 180 °C. The boiling range was 174.9 ± 1.5 °C (448.1 K) through 178.7 ± 0.5 °C (451.9 K).

Executive summary:

GUIDELINE

The investigation was performed in accordance with Organisation for Economic Cooperation and Development (1995). Guideline for the Testing of Chemicals 103 "Boiling Point"and U.S. Environmental Protection Agency (1996) Product Properties Test Guidelines, OPPTS 830.7220 "Boiling Point/Boiling Range".

 

METHODS

Boiling point determinations were performed using a temperature-controlled heating block and appropriate sample tubes. The method was a modification of the Siwoloboff procedure described in OECD 103 incorporating a heated metal block in place of a liquid bath. The test substance is a liquid at room temperature; sub-samples of the test substance were heated in boiling point and boiling point capillary tubes. Measurement of the boiling point was limited to ≤ 400 °C (approximately 673 K), the maximum specified for the instrumentation used.

 

RESULTS

The test substance samples displayed an initial emergence of bubbles at a mean corrected or normalized temperature of 174.9 ± 1.5 °C (448.1 K) for the three tests. The initial bubble emergence was visually observed to be at a slow rate and increased as a function of increasing temperature until the actual boiling point was reached.

 

CONCLUSION

The definitive boiling point testing showed an initial emergence of bubbles at a corrected or normalised temperature of 174.9 ± 1.5 °C (448.1 K). The boiling point was 178.7±0.5 °C (451.9 K). Thermal decomposition seemed to occur at 180 °C. The boiling range was 174.9 ± 1.5 °C (448.1 K) through 178.7 ± 0.5 °C (451.9 K).

Description of key information

The definitive boiling point testing showed an initial emergence of bubbles at a corrected or normalised temperature of 174.9 ± 1.5 °C (448.1 K). The boiling point was 178.7 ± 0.5 °C (451.9 K). Thermal decomposition seemed to occur at 180 °C. The boiling range was 174.9 ± 1.5 °C (448.1 K) through 178.7 ± 0.5 °C (451.9 K) (OECD 103 and OPPTS 830.7220).

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

178.7 °C

Additional information

GUIDELINE

The investigation was performed in accordance with Organisation for Economic Cooperation and Development (1995). Guideline for the Testing of Chemicals 103 "Boiling Point"and U.S. Environmental Protection Agency (1996) Product Properties Test Guidelines, OPPTS 830.7220 "Boiling Point/Boiling Range".

 

METHODS

Boiling point determinations were performed using a temperature-controlled heating block and appropriate sample tubes. The method was a modification of the Siwoloboff procedure described in OECD 103 incorporating a heated metal block in place of a liquid bath. The test substance is a liquid at room temperature; sub-samples of the test substance were heated in boiling point and boiling point capillary tubes. Measurement of the boiling point was limited to ≤ 400 °C (approximately 673 K), the maximum specified for the instrumentation used.

 

RESULTS

The test substance samples displayed an initial emergence of bubbles at a mean corrected or normalized temperature of 174.9 ± 1.5 °C (448.1 K) for the three tests. The initial bubble emergence was visually observed to be at a slow rate and increased as a function of increasing temperature until the actual boiling point was reached.

 

CONCLUSION

The definitive boiling point testing showed an initial emergence of bubbles at a corrected or normalised temperature of 174.9 ± 1.5 °C (448.1 K). The boiling point was 178.7 ± 0.5 °C (451.9 K). Thermal decomposition seemed to occur at 180 °C. The boiling range was 174.9 ± 1.5 °C (448.1 K) through 178.7 ± 0.5 °C (451.9 K).